build/compiler-rt: Fake Clang into using the right assembler to build the ARM bits for the runtime libraries.
build/compiler-rt: Fake Clang into using the right assembler to build the ARM
bits for the runtime libraries.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@125328 91177308-0d34-0410-b5e6-96231b3b80d8

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